Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 287

March 19, 201324 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 19, 2013, 7:59 PM CDT for 24 counties in Texas. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Mar 19, 2013, 7:59 PM CDT (00:59 UTC)
Expired
Mar 19, 2013, 9:30 PM CDT
In force
91 min
Issued by
the Storm Prediction Center
All 24 counties

Bastrop County, TX, Bell County, TX, Blanco County, TX, Brazos County, TX, Brown County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Colorado County, TX, Coryell County, TX, Fayette County, TX, Gillespie County, TX, Hays County, TX, Lampasas County, TX, Lee County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Milam County, TX, Mills County, TX, San Saba County, TX, Travis County, TX, Washington County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 62 km from the middle of the area, began a volume at 01:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.0 hours before the alert went out and 234 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Fort Worth, TX at 00:00Z on 2013-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 00:00Z on 2013-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1868 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 19, 10:24 PM CDTMesoscale DiscussionSPCBastrop, Bell, Blanco, Bosque, Brazos, Burleson and 28 more66 min
Mar 20, 1:41 AM CDTMesoscale DiscussionSPCAustin, Bastrop, Blanco, Brazoria, Burleson, Burnet and 13 more94 min

Nearby

Mesoscale Discussions in Texas, 2013Every mesoscale discussion in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.